Duke Street Capital has injected a further £13m into Parabis Group, helping fund the firm's "ambitious" investment strategy.

Duke Street became the first private equity investor to enter the legal services market when it announced its investment in Parabis in 2012.

The private equity group has made its latest investment in Parabis to fund infrastructure improvements including hiring, property and technology.

Duke Street partner Charlie Troup said of the £13m investment: "The changes to the legal services sector through liberalisation and increased competition have been more profound than anyone anticipated in 2010; we believe the strongest firms will not only embrace these changes but also lead them.

"Parabis has done this through its entry into Consumer Law and the evolution of its ABS models; together we are building a sustainably competitive business which will benefit customers and employees alike."

Parabis Group commercial director Tim Roberts (pictured) added: "This investment provides Parabis with the firepower to move confidently into the future as we use the best talent and technology to unlock extraordinary opportunities for our customers. Duke Street has underlined its long-term commitment to this strategy which is already transforming the way the market views legal services."

During the past year the firm has been restructuring and refocusing its business by rationalising its property holdings and grouping teams geographically according to client demand.

As part of the process the firm closed its Bristol and Colchester offices after a two-month consultation earlier this year. In the meantime it is looking to consolidate its three London bases into a single City office, and has set aside spend of £11m on IT and technology.

The firm is also planning to open an additional base in Cape Town or Johannesburg after selecting an outsourcing company as a preferred supplier.